diff --git a/src/marshmallow/schema.py b/src/marshmallow/schema.py
index 78b386717..33fab6ceb 100644
--- a/src/marshmallow/schema.py
+++ b/src/marshmallow/schema.py
@@ -843,7 +843,12 @@ def _do_load(
         if self._has_processors(PRE_LOAD):
             try:
                 processed_data = self._invoke_load_processors(
-                    PRE_LOAD, data, many=many, original_data=data, partial=partial
+                    PRE_LOAD,
+                    data,
+                    many=many,
+                    original_data=data,
+                    partial=partial,
+                    unknown=unknown,
                 )
             except ValidationError as err:
                 errors = err.normalized_messages()
@@ -896,6 +901,7 @@ def _do_load(
                         many=many,
                         original_data=data,
                         partial=partial,
+                        unknown=unknown,
                     )
                 except ValidationError as err:
                     errors = err.normalized_messages()
@@ -1076,7 +1082,8 @@ def _invoke_load_processors(
         *,
         many: bool,
         original_data,
-        partial: typing.Union[bool, types.StrSequenceOrSet]
+        partial: typing.Union[bool, types.StrSequenceOrSet],
+        unknown: str
     ):
         # This has to invert the order of the dump processors, so run the pass_many
         # processors first.
@@ -1087,6 +1094,7 @@ def _invoke_load_processors(
             many=many,
             original_data=original_data,
             partial=partial,
+            unknown=unknown,
         )
         data = self._invoke_processors(
             tag,
@@ -1095,6 +1103,7 @@ def _invoke_load_processors(
             many=many,
             original_data=original_data,
             partial=partial,
+            unknown=unknown,
         )
         return data